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Home :: Linux :: Ports and Services
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Common Internet ports and services
Although most people dont know about it but the internet works on various ports. Think of it almost like a whole bunch of telephone lines,
with each line providing a service, for instance port 80 lets you see web pages, port 22 allows you to telnet into machines. Each port being
a different way to communicate. I find knowing the ports of most commonly used programs and services is useful in detecting intrusions
or for restricting your firewall.
|
Service |
Port |
Protocol |
| Echo |
7 |
TCP |
| Systat |
11 |
TCP |
| Chargen |
19 |
TCP |
| FTP (data) |
21 |
TCP |
| SSH |
22 |
TCP |
| Telnet |
23 |
TCP |
| SMTP |
25 |
TCP |
| NameServer |
42 |
TCP |
| WHOIS |
43 |
TCP |
| TACACS |
49 |
UDP |
| DNS Look up |
53 |
UDP |
| DNS Zone |
53 |
TCP |
| Oracle SQL-Net |
66 |
TCP |
| TFTP |
69 |
UDP |
| Finger |
79 |
TCP |
| HTTP |
80 |
TCP |
| HTTP-1 |
81 |
TCP |
| Kerberos |
88 |
TCP |
| POP2 |
109 |
TCP |
| POP3 |
110 |
TCP |
| SunRPC |
111 |
TCP |
| SQLServ |
118 |
TCP |
| NNTP |
119 |
TCP |
| NTRPC or DCE |
135 |
TCP |
| NetBios |
139 |
TCP |
| IMap |
143 |
TCP |
| SNMP |
161 |
UDP |
| SNMP-Trap |
162 |
UDP |
| BGP |
179 |
TCP |
| SNMP-Checkpoint |
256 |
TCP |
| LDAP |
389 |
TCP |
| Netware IP |
396 |
TCP |
| Timbuktu |
407 |
TCP |
| HTTPS |
443 |
TCP |
| RLogin |
513 |
TCP |
| RWho |
513 |
UDP |
| RShell |
514 |
TCP |
| SysLog |
514 |
UDP |
| Printer |
515 |
TCP |
| Printer |
515 |
UDP |
| Router |
520 |
UDP |
| Netware-NCP |
524 |
TCP |
| Remotely Possible |
799 |
TCP |
| Socks |
1080 |
TCP |
| Notes |
1352 |
TCP |
| MS-SQL |
1433 |
TCP |
| Citrix |
1494 |
TCP |
| Sybase-SQL Anywhere |
1498 |
TCP |
| Oracle-SRV |
1525 |
TCP |
| Oracle-TLI |
1527 |
TCP |
| PPTP |
1723 |
TCP |
| Winproxy-Proxy |
1745 |
TCP |
| Remotely-Anywhere |
2000 |
TCP |
| CISCO Management |
2001 |
TCP |
| CISCO Management |
4001 |
TCP |
| OpenView |
2447 |
TCP |
| RealSecure |
2998 |
TCP |
| MYSQL |
3306 |
TCP |
| SSQL |
3351 |
TCP |
| NFS |
2049 |
TCP |
| NFS-Lockd |
4045 |
TCP |
| PCAnywhere |
5631 |
TCP |
| X-Windows |
6000 |
TCP |
| IRC |
6667 |
TCP |
| WEB |
8000 |
TCP |
| WEB |
8001 |
TCP |
| WEB |
8002 |
TCP |
| WEB |
8080 |
TCP |
| NetBus |
12345 |
TCP |
| Quake |
26000 |
TCP |
| BackOrfice |
31337 |
UDP |
| RPC-Solaris |
32771 |
TCP |
| SNMP-Solaris |
32780 |
UDP |
| ReachOut |
43188 |
TCP |
| PC-Anywhere-DEF |
65301 |
TCP |
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